Arsen sits next to 4 phonetic neighbors — Arsenio, Jason, and Arsen are the closest matches by sound. Most share Arsen's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"strong, virile, masculine"
"hollow"
"who is like God? (no one!)"
"child of Zeus (folk etymology)"
"fortune guardian"
"oarsman, rower"
"devoted to Demeter"
"from the flower"
"man, husband"
"eponym and patriarch of the Armenian people"
"peaceful pledge"
"connected to healing arts"
"God is my help"
"may God protect the king"
"joyful celebration"
"man from Lucania (southern Italy)"
"horse keeper, stable master"
"eagle, swift and free"
"growth, increase"
"gift of Artemis, safe and sound"
Similar sound: These names share phonetic patterns with Arsen — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Arsen.
Rhythm: Arsen is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.